发明名称 |
HIGH EFFICIENCY WIDEBAND POWER AMPLIFIER |
摘要 |
A method and apparatus for efficient power amplification of a wideband signal with a correspondingly wide modulation bandwidth includes an envelope detector (220), an adaptive split band modulator (270), and a power amplifier (260). The adaptive split band modulator (270) amplifies the low frequency components using a class S modulator (760), and amplifies the high frequency components using a class B amplifier (750). The power supply of the class B amplifier (750) is adaptively modified as a function of the amplitude of the signal that it amplifies. In this manner, the class B amplifier (750) operates at a higher efficiency. |
申请公布号 |
WO9918663(A1) |
申请公布日期 |
1999.04.15 |
申请号 |
WO1998US20759 |
申请日期 |
1998.10.02 |
申请人 |
MOTOROLA INC. |
发明人 |
SIGMON, BERNARD, EUGENE;RAAB, FREDERICK, H.;CLARK, JAMES, ROGER, II |
分类号 |
H03F1/02;H03F3/21 |
主分类号 |
H03F1/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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